- Mashable: Open Source God: 480+ Open Source Applications
- Offers a huge collection of open source applications spanning various domains like accounting, CRM, and email clients. - Open Source Initiative
- Open Source Initiative (OSI) are the managers of the Open Source Defination (OSD) and a community recognised body for reviewing and approving licenses as OSD-conformant. - Wikipedia: List of Free and Open Source Software Packages
- User-edited list of free and open source software applications licensed under open source licenses and free software licenses. - Wikipedia: Open Source Software
- User-generated article on open source software covering history, licensing, non-software usages, and pros and cons. - OpenOffice.org Project (7)
- Browse a collection of sites devoted to the OpenOffice.org Project from Sun Microsystems.
- XOOPS
- A dynamic OO (Object Oriented) based open source portal script written in PHP. - SourceForge
- Directory of open source projects, applications, and software. - Eclipse
- Learn about and interact with the open source community whose projects are focused on providing an extensible development platform and application frameworks for building software. - NewsForge
- Offers news and commentary for the Open Source community. - ISPConfig
- Open source hosting control panel for Linux. - Koders
- Search engine for source code that allows developers to search and browse source code hosted at various open source repositories. - Advogato
- Community resource for free software developers. - Opencores.org
- Endorses development of open source, free IP cores. - AutoHotkey
- Open-source macro scripting for Windows. - Savannah
- Central point for development, distribution, and maintenance of free software. - OSSwin Project
- Software which is able to replace much of the proprietary software most Windows users use nowadays. - Project JXTA
- Pronounced "juxta" and first developed at Sun Microsystems, it's an open, generalized protocol that interoperates with any peer on the network including PCs, servers, and other connected devices. - TheOpenCD.org
- Project to compile and distribute a CD-ROM containing a selection of open source software for use on proprietary operating systems. - JDOM
- An open source Java-based solution for accessing, manipulating, and outputting XML data from Java code. - Open Sources: Voices from the Open Source Revolution
- Collection of essays from leaders of open source movement. - Software in the Public Interest, Inc. (SPI)
- Founded to help organisations develop and distribute open hardware and software. - GnuWin32
- Provides Win32 ports of tools with a GNU open source license. - CollabNet
- Provides tools, services, and platforms to facilitate the software development processes used within the Open Source software community. - Palm Open Source
- Directory of free open source software for PalmOS. - Open Source Mac
- Lists free, open-source software for Mac OS X. - TridiaVNC
- Open source software that allows users to view and control the remote screen, keyboard, and mouse of a host machine. - OpenCyc
- Open source version of the Cyc technology, a general knowledge base and common sense reasoning engine created by Cycorp. - OpenPrivacy Initiative
- Open source collection of software frameworks, protocols, and services providing a cryptographically secure platform for creating, maintaining, and selectively sharing user profile information. - Jtrix
- Offers an open source platform for developing applications. - Seul.org
- Volunteer project currently focusing on Linux in education, Linux in science, advocacy documents, managing and coordinating communications between projects, and hosting related development projects. - Squeakland
- Open-source authoring tool that acts as a playground for developing a community of people who want to work together to invent new media types. - Kulak Commander
- Offers an open source Win32 text mode file manager, text editor, and hex editor with FTP support. - Softpanorama: (slightly skeptical) Open Source Software Educational Society
- Providing educational materials to schools and universities, and serving as a source for the independent study of Linux, scripting languages, and security issues. - Smartcard Key Storage Daemon
- Open source project intended to provide a basic and transparent interface for storing encryption keys on smartcards. - oss4lib
- Lists projects and articles relating to open source systems and software for libraries. - Helix Community
- Collaborative effort between RealNetworks, independent developers, and various companies to create and extend the Helix DNA platform for digital media delivery. - Plex86.org
- Goal is to create an extensible open source PC virtualization software programme which will allow PC and workstation users to run multiple operating systems concurrently on the same machine. - SGI Open Source Repository
- Featuring SGI's GPL'ed Linux kernel patches, XFS: a 64-bit scalable journaling file system, and other free software by SGI employees. - Open Mind
- A collaborative project whose goal is to develop intelligent software by teaching computers the stuff we all know, using netizen contributors to create a giant common sense data set. - Osalt.com Open Source Alternatives
- Find open source software alternatives for well-known commercial products. Includes titles for all operating systems. - Edge.com.ru
- Contains computer industry news and comments about open source software. In Russian. - Gobby
- Free, collaborative, text editor based on libobby, a library which provides synced document buffers. - sendmail.net
- News, information, and community to better connect the users of Open Source sendmail, which handles an estimated 75 percent of the Internet's email traffic. - Open Source Projects at Apple
 - Salon 21st: The Free Software Story
 - Free IP Project
- An effort to make FPGA and ASIC cores available to anyone. - junkfilter
- Procmail-based junk email filter system for filtering junk from Cyber Promotions, Nancynet, Quantcom, and more. - OpenAP
- Source code, build environment, and instructions for flashing an 802.11 access point with Linux. - OpenScience Project
- Dedicated to writing and releasing free and open scientific software. - openadaptor.org
- Java/XML-based software platform for rapid business system integration with little or no custom programming. Enterprise application integration offered as open source software by the Dresdner Investment Bank. - AbriaSoft
- Offers open source technologies based on MySQL database management system. - CVSDude
- Public CVS server and bug tracker for developers, giving direct command line access to source code. - UNESCO: Free & Open Source Software Portal
- UNESCO portal with resources related to free software and open source technology movement. Features developer documentation, associations, software, virtual laboratory, online bibliography, and more. - GroundWork
- Provides open source monitoring solutions for networks, applications, and IT infrastructures. - DocJar
- Search engine for open source Java APIs codes and documents. - ArsWare
- Carries applications, scripts, themes, graphics work, and code libraries written by members of the Ars OpenForum Community. - Authena Open Source DRM
- Devoted to fostering an open source digital rights management system. - Open Channel Foundation
- Publishes innovative and technically advanced software solutions in an open source format. - Robotcop
- An open source module for webservers which helps webmasters prevent spiders from accessing parts of their sites they have marked off limits. - Thinking Monkey
- Brian DeSpain's personal web and technology journal on electronic commerce and open source technology. - JavaCoding.Net
- Open source Java development, ranging from utilities for custom classloading over an XML server to demo and games programming in an applet. - OpenPatents.org
- Exists to change the rules of the patent game such that it is to the advantage of participants to help solve the problems of software patents. - Support Open Source Software
 - Shared Source
- Compares Microsoft's shared source philosophy with the open source model. - Cyber-communism
- Richard Barbrook argues that sharing of code on the Internet is "superseding capitalism" and "successfully constructing the utopian future in the present." - Open Source Movement dot Org
- A survey of important topics related to Open Source. - wayV
- Open source project that attempts to extend the functionality of the mouse by allowing gestures to represent actions. - O'Reilly Open Source Software Convention (OSCON)
- Designed for programmers, developers, strategists, and technical staff involved in open source technology and its applications. - Free Software Project
- Andrew Leonard's book-in-progress is also aiming to serve as an resource on the history and evolution of open source and free software. - GNUWin II
- Free and open source software compilation which contains software, articles, and online help and explanations. - LPTranser
- Command line programme that sends files through the parallel port, using a standard laplink cable. - L.SACon - Linux System Assistant Controls
- Open source project creating a unified Linux control panel to simplify system settings. - Enterprise Open Source
- Directory of enterprise ready open source software. - OSCON 2007
- Information for OSCON 2007 (Open Source Convention), held July 23-27, 2007 in Portland, Oregon. - Olex - OpenLogic Exhange
- Provides a one-stop resource to find and download certified, enterprise-ready open source software packages. - OpenMoko
- GNU/Linux-based software development platform for mobile phones - ProjectPier
- Free, open-source, self-hosted PHP application for managing tasks, projects and teams through an intuitive web interface.
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